GK - Inventions and Discoveries
6.
David Bushnell invented
Answer
Bushnell is credited with creating the first submarine ever used in combat, while studying at Yale in 1775.
Answer :
Option BExplanation :
Bushnell is credited with creating the first submarine ever used in combat, while studying at Yale in 1775.
7.
Cresco graph was invented by
Answer
A crescograph is a device for measuring growth in plants. It was invented in the early 20th century by Sir Jagadish Chandra Bose - an Indian polymath, physicist, biologist, botanist, archaeologist.
Answer :
Option BExplanation :
A crescograph is a device for measuring growth in plants. It was invented in the early 20th century by Sir Jagadish Chandra Bose - an Indian polymath, physicist, biologist, botanist, archaeologist.
8.
Elias Howe invented
Answer
Elias Howe was an American inventor best known for his creation of the modern lockstitch sewing machine.
Answer :
Option CExplanation :
Elias Howe was an American inventor best known for his creation of the modern lockstitch sewing machine.
9.
Artificial gene was created by
Answer
Synthesis of the first complete gene, a yeast tRNA, was demonstrated by Har Gobind Khorana and coworkers in 1972.
Answer :
Option CExplanation :
Synthesis of the first complete gene, a yeast tRNA, was demonstrated by Har Gobind Khorana and coworkers in 1972.
10.
The first effective vaccine against polio was prepared by
Answer
The first polio vaccine, known as inactivated poliovirus vaccine (IPV) or Salk vaccine, was developed in the early 1950s by American physician Jonas Salk.
Answer :
Option DExplanation :
The first polio vaccine, known as inactivated poliovirus vaccine (IPV) or Salk vaccine, was developed in the early 1950s by American physician Jonas Salk.
Jump to page number :